1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ff82979144785e4b72565e734526efd479339f99e72ed24e8582c16445f7a6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b38ae70-76ac-4da4-872e-60c513b25035.json and https://artists.proofprofile.net/proofs/artist/2b38ae70-76ac-4da4-872e-60c513b25035.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c5bf41acd2c120c25f886d79f3b299226672632ce0cd223ec03d2c7ac42d76. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZKDK2082425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963726fad59f438b081e263d145840b893a4a3c8afb0910c10fe8c26ea4793e6. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZKDK2015351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b90c4df45c7ba6b5b9454905a9bc0b12b91b10fdfe91e838cbca1d0aecc4eb. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZKDK2029244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a3b54ceaa7587df39717ba5d0369dea6413700b2aab7fece413812e2390bb5. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZKDK2011927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77df9fcf2bea45747036d425d8712605b9be7920673fa4c5e114d940f86e3f46. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZKDK2052736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6500f0badb995d5136fe511033c7397219aa76261af10e5209a4ec9a0a9fc3b1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZKDK2035172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5350a3cef927d5fdb65203935222a83afcd840782b08956358e4528fc2bedaf. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZJRC2055749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415694756d5d614a273ecf469570e599be3721316d47aad3b2507ddbd682f425. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZH5E2267353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259872bfa4dd0bc10e4d228ce766fc475a4ab7d4f16c9f4fd1b4b905538cf391. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:32:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZKDK2381453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed348c32aeef6efa61227bf189597bab2d4b174b2592dd08b791cd4169569ba. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFP52425482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3e646d13fbfd5224b765043a8a38b9865e315ef13d9c7b0b9414a8487e5923. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFP52443404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bef7a5a07ccce2109d03d393bcce2bfcd63bbe4fff8e10967703f58a1d2545. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZH5E2412029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd591dfe198a3fe015c54b966652c6c75e2ac1a4da0b6732b8d278f996c8c44. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFR2479297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ac5268df75d873b45dc92cb1b51aad9be2a2a639efb37d7d501f50927e2280. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:50:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZH5E2412067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8195e057f5500fa1d745e5c7d7fd2603567c57deaaff462f461b2f6c5980c5. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM8DG2549567.